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<pre><span class="sourceLineNo">001</span>/* ===========================================================<a name="line.1"></a>
<span class="sourceLineNo">002</span> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a>
<span class="sourceLineNo">003</span> * ===========================================================<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.<a name="line.5"></a>
<span class="sourceLineNo">006</span> *<a name="line.6"></a>
<span class="sourceLineNo">007</span> * Project Info:  http://www.jfree.org/jfreechart/index.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * This library is free software; you can redistribute it and/or modify it<a name="line.9"></a>
<span class="sourceLineNo">010</span> * under the terms of the GNU Lesser General Public License as published by<a name="line.10"></a>
<span class="sourceLineNo">011</span> * the Free Software Foundation; either version 2.1 of the License, or<a name="line.11"></a>
<span class="sourceLineNo">012</span> * (at your option) any later version.<a name="line.12"></a>
<span class="sourceLineNo">013</span> *<a name="line.13"></a>
<span class="sourceLineNo">014</span> * This library is distributed in the hope that it will be useful, but<a name="line.14"></a>
<span class="sourceLineNo">015</span> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY<a name="line.15"></a>
<span class="sourceLineNo">016</span> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public<a name="line.16"></a>
<span class="sourceLineNo">017</span> * License for more details.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a>
<span class="sourceLineNo">020</span> * License along with this library; if not, write to the Free Software<a name="line.20"></a>
<span class="sourceLineNo">021</span> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,<a name="line.21"></a>
<span class="sourceLineNo">022</span> * USA.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * [Java is a trademark or registered trademark of Sun Microsystems, Inc.<a name="line.24"></a>
<span class="sourceLineNo">025</span> * in the United States and other countries.]<a name="line.25"></a>
<span class="sourceLineNo">026</span> *<a name="line.26"></a>
<span class="sourceLineNo">027</span> * ---------------<a name="line.27"></a>
<span class="sourceLineNo">028</span> * PaintAlpha.java<a name="line.28"></a>
<span class="sourceLineNo">029</span> * ---------------<a name="line.29"></a>
<span class="sourceLineNo">030</span> * (C) Copyright 2011-2014 by DaveLaw and Contributors.<a name="line.30"></a>
<span class="sourceLineNo">031</span> *<a name="line.31"></a>
<span class="sourceLineNo">032</span> * Original Author:  DaveLaw (dave ATT davelaw D0TT de);<a name="line.32"></a>
<span class="sourceLineNo">033</span> * Contributor(s):   David Gilbert (for Object Refinery Limited);<a name="line.33"></a>
<span class="sourceLineNo">034</span> *<a name="line.34"></a>
<span class="sourceLineNo">035</span> * Changes<a name="line.35"></a>
<span class="sourceLineNo">036</span> * -------<a name="line.36"></a>
<span class="sourceLineNo">037</span> * 09-Mar-2011 : Written (DaveLaw)<a name="line.37"></a>
<span class="sourceLineNo">038</span> * 03-Jul-2012 : JDK 1.6 References made reflective for JDK 1.3 compatibility <a name="line.38"></a>
<span class="sourceLineNo">039</span> *               (DaveLaw);<a name="line.39"></a>
<span class="sourceLineNo">040</span> * 16-Sep-2013 : Removed reflection since we are requiring JDK 1.6 now (DG)<a name="line.40"></a>
<span class="sourceLineNo">041</span> *<a name="line.41"></a>
<span class="sourceLineNo">042</span> */<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>package org.jfree.chart.util;<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>import java.awt.Color;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import java.awt.GradientPaint;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import java.awt.LinearGradientPaint;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import java.awt.Paint;<a name="line.49"></a>
<span class="sourceLineNo">050</span>import java.awt.RadialGradientPaint;<a name="line.50"></a>
<span class="sourceLineNo">051</span>import java.awt.TexturePaint;<a name="line.51"></a>
<span class="sourceLineNo">052</span>import java.awt.image.BufferedImage;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import java.awt.image.IndexColorModel;<a name="line.53"></a>
<span class="sourceLineNo">054</span>import java.awt.image.WritableRaster;<a name="line.54"></a>
<span class="sourceLineNo">055</span>import java.util.Hashtable;<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>/**<a name="line.57"></a>
<span class="sourceLineNo">058</span> * This class contains static methods for the manipulation<a name="line.58"></a>
<span class="sourceLineNo">059</span> * of objects of type &lt;code&gt;Paint&lt;/code&gt;<a name="line.59"></a>
<span class="sourceLineNo">060</span> * &lt;p&gt;<a name="line.60"></a>
<span class="sourceLineNo">061</span> * The intention is to honour the alpha-channel in the process.<a name="line.61"></a>
<span class="sourceLineNo">062</span> * &lt;code&gt;PaintAlpha&lt;/code&gt; was originally conceived to improve the<a name="line.62"></a>
<span class="sourceLineNo">063</span> * rendering of 3D Shapes with transparent colours and to allow<a name="line.63"></a>
<span class="sourceLineNo">064</span> * invisible bars by making them completely transparent.<a name="line.64"></a>
<span class="sourceLineNo">065</span> * &lt;p&gt;<a name="line.65"></a>
<span class="sourceLineNo">066</span> * In, for example<a name="line.66"></a>
<span class="sourceLineNo">067</span> * {@link org.jfree.chart.renderer.category.StackedBarRenderer3D StackedBarRenderer3D},<a name="line.67"></a>
<span class="sourceLineNo">068</span> * bars are rendered with 6 faces. The front face is rendered with<a name="line.68"></a>
<span class="sourceLineNo">069</span> * the &lt;code&gt;Paint&lt;/code&gt; requested. The other 5 faces are rendered<a name="line.69"></a>
<span class="sourceLineNo">070</span> * darker to achieve the 3D effect.<a name="line.70"></a>
<span class="sourceLineNo">071</span> * &lt;p&gt;<a name="line.71"></a>
<span class="sourceLineNo">072</span> * Previously {@link Color#darker()} was used for this,<a name="line.72"></a>
<span class="sourceLineNo">073</span> * which always returns an opaque colour.<a name="line.73"></a>
<span class="sourceLineNo">074</span> * &lt;p&gt;<a name="line.74"></a>
<span class="sourceLineNo">075</span> * Additionally there are methods to control the behaviour and<a name="line.75"></a>
<span class="sourceLineNo">076</span> * in particular a {@link PaintAlpha#cloneImage(BufferedImage) cloneImage(..)}<a name="line.76"></a>
<span class="sourceLineNo">077</span> * method which is needed to darken objects of type {@link TexturePaint}.<a name="line.77"></a>
<span class="sourceLineNo">078</span> *<a name="line.78"></a>
<span class="sourceLineNo">079</span> * @author  DaveLaw<a name="line.79"></a>
<span class="sourceLineNo">080</span> * <a name="line.80"></a>
<span class="sourceLineNo">081</span> * @since 1.0.15<a name="line.81"></a>
<span class="sourceLineNo">082</span> */<a name="line.82"></a>
<span class="sourceLineNo">083</span>public class PaintAlpha {<a name="line.83"></a>
<span class="sourceLineNo">084</span>    // TODO Revert to SVN revision 2469 in JFreeChart 1.0.16<a name="line.84"></a>
<span class="sourceLineNo">085</span>    //      (MultipleGradientPaint's / JDK issues)<a name="line.85"></a>
<span class="sourceLineNo">086</span>    // TODO THEN: change visibility of ALL darker(...) Methods EXCEPT<a name="line.86"></a>
<span class="sourceLineNo">087</span>    //      darker(Paint) to private!<a name="line.87"></a>
<span class="sourceLineNo">088</span><a name="line.88"></a>
<span class="sourceLineNo">089</span>    /**<a name="line.89"></a>
<span class="sourceLineNo">090</span>     * Multiplier for the &lt;code&gt;darker&lt;/code&gt; Methods.&lt;br&gt;<a name="line.90"></a>
<span class="sourceLineNo">091</span>     * (taken from {@link java.awt.Color}.FACTOR)<a name="line.91"></a>
<span class="sourceLineNo">092</span>     */<a name="line.92"></a>
<span class="sourceLineNo">093</span>    private static final double FACTOR = 0.7;<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>    private static boolean legacyAlpha = false;<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span>    /**<a name="line.97"></a>
<span class="sourceLineNo">098</span>     * Per default &lt;code&gt;PaintAlpha&lt;/code&gt; will try to honour alpha-channel<a name="line.98"></a>
<span class="sourceLineNo">099</span>     * information.  In the past this was not the case.<a name="line.99"></a>
<span class="sourceLineNo">100</span>     * If you wish legacy functionality for your application you can request<a name="line.100"></a>
<span class="sourceLineNo">101</span>     * this here.<a name="line.101"></a>
<span class="sourceLineNo">102</span>     *<a name="line.102"></a>
<span class="sourceLineNo">103</span>     * @param legacyAlpha boolean<a name="line.103"></a>
<span class="sourceLineNo">104</span>     *<a name="line.104"></a>
<span class="sourceLineNo">105</span>     * @return the previous setting<a name="line.105"></a>
<span class="sourceLineNo">106</span>     */<a name="line.106"></a>
<span class="sourceLineNo">107</span>    public static boolean setLegacyAlpha(boolean legacyAlpha) {<a name="line.107"></a>
<span class="sourceLineNo">108</span>        boolean old = PaintAlpha.legacyAlpha;<a name="line.108"></a>
<span class="sourceLineNo">109</span>        PaintAlpha.legacyAlpha = legacyAlpha;<a name="line.109"></a>
<span class="sourceLineNo">110</span>        return old;<a name="line.110"></a>
<span class="sourceLineNo">111</span>    }<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span>    /**<a name="line.113"></a>
<span class="sourceLineNo">114</span>     * Create a new (if possible, darker) &lt;code&gt;Paint&lt;/code&gt; of the same Type.<a name="line.114"></a>
<span class="sourceLineNo">115</span>     * If the Type is not supported, the original &lt;code&gt;Paint&lt;/code&gt; is returned.<a name="line.115"></a>
<span class="sourceLineNo">116</span>     * &lt;p&gt;<a name="line.116"></a>
<span class="sourceLineNo">117</span>     * @param paint a &lt;code&gt;Paint&lt;/code&gt; implementation<a name="line.117"></a>
<span class="sourceLineNo">118</span>     * (e.g. {@link Color}, {@link GradientPaint}, {@link TexturePaint},..)<a name="line.118"></a>
<span class="sourceLineNo">119</span>     * &lt;p&gt;<a name="line.119"></a>
<span class="sourceLineNo">120</span>     * @return a (usually new, see above) &lt;code&gt;Paint&lt;/code&gt;<a name="line.120"></a>
<span class="sourceLineNo">121</span>     */<a name="line.121"></a>
<span class="sourceLineNo">122</span>    public static Paint darker(Paint paint) {<a name="line.122"></a>
<span class="sourceLineNo">123</span><a name="line.123"></a>
<span class="sourceLineNo">124</span>        if (paint instanceof Color) {<a name="line.124"></a>
<span class="sourceLineNo">125</span>            return darker((Color) paint);<a name="line.125"></a>
<span class="sourceLineNo">126</span>        }<a name="line.126"></a>
<span class="sourceLineNo">127</span>        if (legacyAlpha == true) {<a name="line.127"></a>
<span class="sourceLineNo">128</span>            /*<a name="line.128"></a>
<span class="sourceLineNo">129</span>             * Legacy? Just return the original Paint.<a name="line.129"></a>
<span class="sourceLineNo">130</span>             * (this corresponds EXACTLY to how Paints used to be darkened)<a name="line.130"></a>
<span class="sourceLineNo">131</span>             */<a name="line.131"></a>
<span class="sourceLineNo">132</span>            return paint;<a name="line.132"></a>
<span class="sourceLineNo">133</span>        }<a name="line.133"></a>
<span class="sourceLineNo">134</span>        if (paint instanceof GradientPaint) {<a name="line.134"></a>
<span class="sourceLineNo">135</span>            return darker((GradientPaint) paint);<a name="line.135"></a>
<span class="sourceLineNo">136</span>        }<a name="line.136"></a>
<span class="sourceLineNo">137</span>        if (paint instanceof LinearGradientPaint) {<a name="line.137"></a>
<span class="sourceLineNo">138</span>            return darkerLinearGradientPaint((LinearGradientPaint) paint);<a name="line.138"></a>
<span class="sourceLineNo">139</span>        }<a name="line.139"></a>
<span class="sourceLineNo">140</span>        if (paint instanceof RadialGradientPaint) {<a name="line.140"></a>
<span class="sourceLineNo">141</span>            return darkerRadialGradientPaint((RadialGradientPaint) paint);<a name="line.141"></a>
<span class="sourceLineNo">142</span>        }<a name="line.142"></a>
<span class="sourceLineNo">143</span>        if (paint instanceof TexturePaint) {<a name="line.143"></a>
<span class="sourceLineNo">144</span>            try {<a name="line.144"></a>
<span class="sourceLineNo">145</span>                return darkerTexturePaint((TexturePaint) paint);<a name="line.145"></a>
<span class="sourceLineNo">146</span>            }<a name="line.146"></a>
<span class="sourceLineNo">147</span>            catch (Exception e) {<a name="line.147"></a>
<span class="sourceLineNo">148</span>                /*<a name="line.148"></a>
<span class="sourceLineNo">149</span>                 * Lots can go wrong while fiddling with Images, Color Models<a name="line.149"></a>
<span class="sourceLineNo">150</span>                 * &amp; such!  If anything at all goes awry, just return the original<a name="line.150"></a>
<span class="sourceLineNo">151</span>                 * TexturePaint.  (TexturePaint's are immutable anyway, so no harm<a name="line.151"></a>
<span class="sourceLineNo">152</span>                 * done)<a name="line.152"></a>
<span class="sourceLineNo">153</span>                 */<a name="line.153"></a>
<span class="sourceLineNo">154</span>                return paint;<a name="line.154"></a>
<span class="sourceLineNo">155</span>            }<a name="line.155"></a>
<span class="sourceLineNo">156</span>        }<a name="line.156"></a>
<span class="sourceLineNo">157</span>        return paint;<a name="line.157"></a>
<span class="sourceLineNo">158</span>    }<a name="line.158"></a>
<span class="sourceLineNo">159</span><a name="line.159"></a>
<span class="sourceLineNo">160</span>    /**<a name="line.160"></a>
<span class="sourceLineNo">161</span>     * Similar to {@link Color#darker()}.<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * &lt;p&gt;<a name="line.162"></a>
<span class="sourceLineNo">163</span>     * The essential difference is that this method<a name="line.163"></a>
<span class="sourceLineNo">164</span>     * maintains the alpha-channel unchanged&lt;br&gt;<a name="line.164"></a>
<span class="sourceLineNo">165</span>     *<a name="line.165"></a>
<span class="sourceLineNo">166</span>     * @param paint a &lt;code&gt;Color&lt;/code&gt;<a name="line.166"></a>
<span class="sourceLineNo">167</span>     *<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * @return a darker version of the &lt;code&gt;Color&lt;/code&gt;<a name="line.168"></a>
<span class="sourceLineNo">169</span>     */<a name="line.169"></a>
<span class="sourceLineNo">170</span>    private static Color darker(Color paint) {<a name="line.170"></a>
<span class="sourceLineNo">171</span>        return new Color(<a name="line.171"></a>
<span class="sourceLineNo">172</span>                (int)(paint.getRed  () * FACTOR),<a name="line.172"></a>
<span class="sourceLineNo">173</span>                (int)(paint.getGreen() * FACTOR),<a name="line.173"></a>
<span class="sourceLineNo">174</span>                (int)(paint.getBlue () * FACTOR), paint.getAlpha());<a name="line.174"></a>
<span class="sourceLineNo">175</span>    }<a name="line.175"></a>
<span class="sourceLineNo">176</span><a name="line.176"></a>
<span class="sourceLineNo">177</span>    /**<a name="line.177"></a>
<span class="sourceLineNo">178</span>     * Create a new &lt;code&gt;GradientPaint&lt;/code&gt; with its colors darkened.<a name="line.178"></a>
<span class="sourceLineNo">179</span>     *<a name="line.179"></a>
<span class="sourceLineNo">180</span>     * @param paint  the gradient paint (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.180"></a>
<span class="sourceLineNo">181</span>     *<a name="line.181"></a>
<span class="sourceLineNo">182</span>     * @return a darker version of the &lt;code&gt;GradientPaint&lt;/code&gt;<a name="line.182"></a>
<span class="sourceLineNo">183</span>     */<a name="line.183"></a>
<span class="sourceLineNo">184</span>    private static GradientPaint darker(GradientPaint paint) {<a name="line.184"></a>
<span class="sourceLineNo">185</span>        return new GradientPaint(<a name="line.185"></a>
<span class="sourceLineNo">186</span>                paint.getPoint1(), darker(paint.getColor1()),<a name="line.186"></a>
<span class="sourceLineNo">187</span>                paint.getPoint2(), darker(paint.getColor2()),<a name="line.187"></a>
<span class="sourceLineNo">188</span>                paint.isCyclic());<a name="line.188"></a>
<span class="sourceLineNo">189</span>    }<a name="line.189"></a>
<span class="sourceLineNo">190</span><a name="line.190"></a>
<span class="sourceLineNo">191</span>    /**<a name="line.191"></a>
<span class="sourceLineNo">192</span>     * Create a new Gradient with its colours darkened.<a name="line.192"></a>
<span class="sourceLineNo">193</span>     *<a name="line.193"></a>
<span class="sourceLineNo">194</span>     * @param paint a &lt;code&gt;LinearGradientPaint&lt;/code&gt;<a name="line.194"></a>
<span class="sourceLineNo">195</span>     *<a name="line.195"></a>
<span class="sourceLineNo">196</span>     * @return a darker version of the &lt;code&gt;LinearGradientPaint&lt;/code&gt;<a name="line.196"></a>
<span class="sourceLineNo">197</span>     */<a name="line.197"></a>
<span class="sourceLineNo">198</span>    private static Paint darkerLinearGradientPaint(LinearGradientPaint paint) {<a name="line.198"></a>
<span class="sourceLineNo">199</span>        final Color[] paintColors = paint.getColors();<a name="line.199"></a>
<span class="sourceLineNo">200</span>        for (int i = 0; i &lt; paintColors.length; i++) {<a name="line.200"></a>
<span class="sourceLineNo">201</span>            paintColors[i] = darker(paintColors[i]);<a name="line.201"></a>
<span class="sourceLineNo">202</span>        }<a name="line.202"></a>
<span class="sourceLineNo">203</span>        return new LinearGradientPaint(paint.getStartPoint(),<a name="line.203"></a>
<span class="sourceLineNo">204</span>                paint.getEndPoint(), paint.getFractions(), paintColors,<a name="line.204"></a>
<span class="sourceLineNo">205</span>                paint.getCycleMethod(), paint.getColorSpace(), <a name="line.205"></a>
<span class="sourceLineNo">206</span>                paint.getTransform());<a name="line.206"></a>
<span class="sourceLineNo">207</span>    }<a name="line.207"></a>
<span class="sourceLineNo">208</span><a name="line.208"></a>
<span class="sourceLineNo">209</span>    /**<a name="line.209"></a>
<span class="sourceLineNo">210</span>     * Create a new Gradient with its colours darkened.<a name="line.210"></a>
<span class="sourceLineNo">211</span>     *<a name="line.211"></a>
<span class="sourceLineNo">212</span>     * @param paint a &lt;code&gt;RadialGradientPaint&lt;/code&gt;<a name="line.212"></a>
<span class="sourceLineNo">213</span>     *<a name="line.213"></a>
<span class="sourceLineNo">214</span>     * @return a darker version of the &lt;code&gt;RadialGradientPaint&lt;/code&gt;<a name="line.214"></a>
<span class="sourceLineNo">215</span>     */<a name="line.215"></a>
<span class="sourceLineNo">216</span>    private static Paint darkerRadialGradientPaint(RadialGradientPaint paint) {<a name="line.216"></a>
<span class="sourceLineNo">217</span>        final Color[] paintColors = paint.getColors();<a name="line.217"></a>
<span class="sourceLineNo">218</span>        for (int i = 0; i &lt; paintColors.length; i++) {<a name="line.218"></a>
<span class="sourceLineNo">219</span>            paintColors[i] = darker(paintColors[i]);<a name="line.219"></a>
<span class="sourceLineNo">220</span>        }<a name="line.220"></a>
<span class="sourceLineNo">221</span>        return new RadialGradientPaint(paint.getCenterPoint(), <a name="line.221"></a>
<span class="sourceLineNo">222</span>                paint.getRadius(), paint.getFocusPoint(), <a name="line.222"></a>
<span class="sourceLineNo">223</span>                paint.getFractions(), paintColors, paint.getCycleMethod(),<a name="line.223"></a>
<span class="sourceLineNo">224</span>                paint.getColorSpace(), paint.getTransform());<a name="line.224"></a>
<span class="sourceLineNo">225</span>    }<a name="line.225"></a>
<span class="sourceLineNo">226</span><a name="line.226"></a>
<span class="sourceLineNo">227</span>    /**<a name="line.227"></a>
<span class="sourceLineNo">228</span>     * Create a new &lt;code&gt;TexturePaint&lt;/code&gt; with its colors darkened.<a name="line.228"></a>
<span class="sourceLineNo">229</span>     * &lt;p&gt;<a name="line.229"></a>
<span class="sourceLineNo">230</span>     * This entails cloning the underlying &lt;code&gt;BufferedImage&lt;/code&gt;,<a name="line.230"></a>
<span class="sourceLineNo">231</span>     * then darkening each color-pixel individually!<a name="line.231"></a>
<span class="sourceLineNo">232</span>     *<a name="line.232"></a>
<span class="sourceLineNo">233</span>     * @param paint a &lt;code&gt;TexturePaint&lt;/code&gt;<a name="line.233"></a>
<span class="sourceLineNo">234</span>     *<a name="line.234"></a>
<span class="sourceLineNo">235</span>     * @return a darker version of the &lt;code&gt;TexturePaint&lt;/code&gt;<a name="line.235"></a>
<span class="sourceLineNo">236</span>     */<a name="line.236"></a>
<span class="sourceLineNo">237</span>    private static TexturePaint darkerTexturePaint(TexturePaint paint) {<a name="line.237"></a>
<span class="sourceLineNo">238</span>        /**<a name="line.238"></a>
<span class="sourceLineNo">239</span>         * Color Models with pre-multiplied Alpha tested OK without any<a name="line.239"></a>
<span class="sourceLineNo">240</span>         * special logic<a name="line.240"></a>
<span class="sourceLineNo">241</span>         *<a name="line.241"></a>
<span class="sourceLineNo">242</span>         * BufferedImage.TYPE_INT_ARGB_PRE:    // Type 03: tested OK 2011.02.27<a name="line.242"></a>
<span class="sourceLineNo">243</span>         * BufferedImage.TYPE_4BYTE_ABGR_PRE:  // Type 07: tested OK 2011.02.27<a name="line.243"></a>
<span class="sourceLineNo">244</span>         */<a name="line.244"></a>
<span class="sourceLineNo">245</span>        if (paint.getImage().getColorModel().isAlphaPremultiplied()) {<a name="line.245"></a>
<span class="sourceLineNo">246</span>            /* Placeholder */<a name="line.246"></a>
<span class="sourceLineNo">247</span>        }<a name="line.247"></a>
<span class="sourceLineNo">248</span><a name="line.248"></a>
<span class="sourceLineNo">249</span>        BufferedImage img = cloneImage(paint.getImage());<a name="line.249"></a>
<span class="sourceLineNo">250</span><a name="line.250"></a>
<span class="sourceLineNo">251</span>        WritableRaster ras = img.copyData(null);<a name="line.251"></a>
<span class="sourceLineNo">252</span><a name="line.252"></a>
<span class="sourceLineNo">253</span>        final int miX = ras.getMinX();<a name="line.253"></a>
<span class="sourceLineNo">254</span>        final int miY = ras.getMinY();<a name="line.254"></a>
<span class="sourceLineNo">255</span>        final int maY = ras.getMinY() + ras.getHeight();<a name="line.255"></a>
<span class="sourceLineNo">256</span><a name="line.256"></a>
<span class="sourceLineNo">257</span>        final int   wid = ras.getWidth();<a name="line.257"></a>
<span class="sourceLineNo">258</span><a name="line.258"></a>
<span class="sourceLineNo">259</span>        /**/  int[] pix = new int[wid * img.getSampleModel().getNumBands()];<a name="line.259"></a>
<span class="sourceLineNo">260</span>        /* (pix-buffer is large enough for all pixels of one row) */<a name="line.260"></a>
<span class="sourceLineNo">261</span><a name="line.261"></a>
<span class="sourceLineNo">262</span>        /**<a name="line.262"></a>
<span class="sourceLineNo">263</span>         * Indexed Color Models (sort of a Palette) CANNOT be simply<a name="line.263"></a>
<span class="sourceLineNo">264</span>         * multiplied (the pixel-value is just an index into the Palette).<a name="line.264"></a>
<span class="sourceLineNo">265</span>         *<a name="line.265"></a>
<span class="sourceLineNo">266</span>         * Fortunately, IndexColorModel.getComponents(..) resolves the colors.<a name="line.266"></a>
<span class="sourceLineNo">267</span>         * The resolved colors can then be multiplied by our FACTOR.<a name="line.267"></a>
<span class="sourceLineNo">268</span>         * IndexColorModel.getDataElement(..) then tries to map the computed<a name="line.268"></a>
<span class="sourceLineNo">269</span>         * color to the "nearest" in the Palette.<a name="line.269"></a>
<span class="sourceLineNo">270</span>         *<a name="line.270"></a>
<span class="sourceLineNo">271</span>         * It is quite possible that the "nearest" color is the ORIGINAL<a name="line.271"></a>
<span class="sourceLineNo">272</span>         * color!  In the worst case, the returned Image will be identical to<a name="line.272"></a>
<span class="sourceLineNo">273</span>         * the original.<a name="line.273"></a>
<span class="sourceLineNo">274</span>         *<a name="line.274"></a>
<span class="sourceLineNo">275</span>         * Applies to following Image Types:<a name="line.275"></a>
<span class="sourceLineNo">276</span>         *<a name="line.276"></a>
<span class="sourceLineNo">277</span>         * BufferedImage.TYPE_BYTE_BINARY:    // Type 12: tested OK 2011.02.27<a name="line.277"></a>
<span class="sourceLineNo">278</span>         * BufferedImage.TYPE_BYTE_INDEXED:   // Type 13: tested OK 2011.02.27<a name="line.278"></a>
<span class="sourceLineNo">279</span>         */<a name="line.279"></a>
<span class="sourceLineNo">280</span>        if (img.getColorModel() instanceof IndexColorModel) {<a name="line.280"></a>
<span class="sourceLineNo">281</span><a name="line.281"></a>
<span class="sourceLineNo">282</span>            int[] nco = new int[4]; // RGB (+ optional Alpha which we leave<a name="line.282"></a>
<span class="sourceLineNo">283</span>                                    // unchanged)<a name="line.283"></a>
<span class="sourceLineNo">284</span><a name="line.284"></a>
<span class="sourceLineNo">285</span>            for (int y = miY; y &lt; maY; y++)  {<a name="line.285"></a>
<span class="sourceLineNo">286</span><a name="line.286"></a>
<span class="sourceLineNo">287</span>                pix = ras.getPixels(miX, y, wid, 1, pix);<a name="line.287"></a>
<span class="sourceLineNo">288</span><a name="line.288"></a>
<span class="sourceLineNo">289</span>                for (int p = 0; p &lt; pix.length; p++) {<a name="line.289"></a>
<span class="sourceLineNo">290</span>                    nco    =  img.getColorModel().getComponents(pix[p], nco, 0);<a name="line.290"></a>
<span class="sourceLineNo">291</span>                    nco[0] *= FACTOR; // Red<a name="line.291"></a>
<span class="sourceLineNo">292</span>                    nco[1] *= FACTOR; // Green<a name="line.292"></a>
<span class="sourceLineNo">293</span>                    nco[2] *= FACTOR; // Blue. Now map computed colour to<a name="line.293"></a>
<span class="sourceLineNo">294</span>                                      // nearest in Palette...<a name="line.294"></a>
<span class="sourceLineNo">295</span>                    pix[p] = img.getColorModel().getDataElement(nco, 0);<a name="line.295"></a>
<span class="sourceLineNo">296</span>                }<a name="line.296"></a>
<span class="sourceLineNo">297</span>                /**/ ras.setPixels(miX, y, wid, 1, pix);<a name="line.297"></a>
<span class="sourceLineNo">298</span>            }<a name="line.298"></a>
<span class="sourceLineNo">299</span>            img.setData(ras);<a name="line.299"></a>
<span class="sourceLineNo">300</span><a name="line.300"></a>
<span class="sourceLineNo">301</span>            return new TexturePaint(img, paint.getAnchorRect());<a name="line.301"></a>
<span class="sourceLineNo">302</span>        }<a name="line.302"></a>
<span class="sourceLineNo">303</span><a name="line.303"></a>
<span class="sourceLineNo">304</span>        /**<a name="line.304"></a>
<span class="sourceLineNo">305</span>         * For the other 2 Color Models, java.awt.image.ComponentColorModel and<a name="line.305"></a>
<span class="sourceLineNo">306</span>         * java.awt.image.DirectColorModel, the order of subpixels returned by<a name="line.306"></a>
<span class="sourceLineNo">307</span>         * ras.getPixels(..) was observed to correspond to the following...<a name="line.307"></a>
<span class="sourceLineNo">308</span>         */<a name="line.308"></a>
<span class="sourceLineNo">309</span>        if (img.getSampleModel().getNumBands() == 4) {<a name="line.309"></a>
<span class="sourceLineNo">310</span>            /**<a name="line.310"></a>
<span class="sourceLineNo">311</span>             * The following Image Types have an Alpha-channel which we will<a name="line.311"></a>
<span class="sourceLineNo">312</span>             * leave unchanged:<a name="line.312"></a>
<span class="sourceLineNo">313</span>             *<a name="line.313"></a>
<span class="sourceLineNo">314</span>             * BufferedImage.TYPE_INT_ARGB:   // Type 02: tested OK 2011.02.27<a name="line.314"></a>
<span class="sourceLineNo">315</span>             * BufferedImage.TYPE_4BYTE_ABGR: // Type 06: tested OK 2011.02.27<a name="line.315"></a>
<span class="sourceLineNo">316</span>             */<a name="line.316"></a>
<span class="sourceLineNo">317</span>            for (int y = miY; y &lt; maY; y++)  {<a name="line.317"></a>
<span class="sourceLineNo">318</span><a name="line.318"></a>
<span class="sourceLineNo">319</span>                pix = ras.getPixels(miX, y, wid, 1, pix);<a name="line.319"></a>
<span class="sourceLineNo">320</span><a name="line.320"></a>
<span class="sourceLineNo">321</span>                for (int p = 0; p &lt; pix.length;) {<a name="line.321"></a>
<span class="sourceLineNo">322</span>                    pix[p] = (int)(pix[p++] * FACTOR); // Red<a name="line.322"></a>
<span class="sourceLineNo">323</span>                    pix[p] = (int)(pix[p++] * FACTOR); // Green<a name="line.323"></a>
<span class="sourceLineNo">324</span>                    pix[p] = (int)(pix[p++] * FACTOR); // Blue<a name="line.324"></a>
<span class="sourceLineNo">325</span>                    /* Ignore alpha-channel -&gt; */p++;<a name="line.325"></a>
<span class="sourceLineNo">326</span>                }<a name="line.326"></a>
<span class="sourceLineNo">327</span>                /**/  ras.setPixels(miX, y, wid, 1, pix);<a name="line.327"></a>
<span class="sourceLineNo">328</span>            }<a name="line.328"></a>
<span class="sourceLineNo">329</span>            img.setData(ras);<a name="line.329"></a>
<span class="sourceLineNo">330</span>            return new TexturePaint(img, paint.getAnchorRect());<a name="line.330"></a>
<span class="sourceLineNo">331</span>        } else {<a name="line.331"></a>
<span class="sourceLineNo">332</span>            for (int y = miY; y &lt; maY; y++)  {<a name="line.332"></a>
<span class="sourceLineNo">333</span><a name="line.333"></a>
<span class="sourceLineNo">334</span>                pix = ras.getPixels(miX, y, wid, 1, pix);<a name="line.334"></a>
<span class="sourceLineNo">335</span><a name="line.335"></a>
<span class="sourceLineNo">336</span>                for (int p = 0; p &lt; pix.length; p++) {<a name="line.336"></a>
<span class="sourceLineNo">337</span>                    pix[p] = (int)(pix[p] * FACTOR);<a name="line.337"></a>
<span class="sourceLineNo">338</span>                }<a name="line.338"></a>
<span class="sourceLineNo">339</span>                /**/  ras.setPixels(miX, y, wid, 1, pix);<a name="line.339"></a>
<span class="sourceLineNo">340</span>            }<a name="line.340"></a>
<span class="sourceLineNo">341</span>            img.setData(ras);<a name="line.341"></a>
<span class="sourceLineNo">342</span>            return new TexturePaint(img, paint.getAnchorRect());<a name="line.342"></a>
<span class="sourceLineNo">343</span>            /**<a name="line.343"></a>
<span class="sourceLineNo">344</span>             * Above, we multiplied every pixel by our FACTOR because the<a name="line.344"></a>
<span class="sourceLineNo">345</span>             * applicable Image Types consist only of color or grey channels:<a name="line.345"></a>
<span class="sourceLineNo">346</span>             *<a name="line.346"></a>
<span class="sourceLineNo">347</span>             * BufferedImage.TYPE_INT_RGB:        // Type 01: tested OK 2011.02.27<a name="line.347"></a>
<span class="sourceLineNo">348</span>             * BufferedImage.TYPE_INT_BGR:        // Type 04: tested OK 2011.02.27<a name="line.348"></a>
<span class="sourceLineNo">349</span>             * BufferedImage.TYPE_3BYTE_BGR:      // Type 05: tested OK 2011.02.27<a name="line.349"></a>
<span class="sourceLineNo">350</span>             * BufferedImage.TYPE_BYTE_GRAY:      // Type 10: tested OK 2011.02.27<a name="line.350"></a>
<span class="sourceLineNo">351</span>             * BufferedImage.TYPE_USHORT_GRAY:    // Type 11: tested OK 2011.02.27<a name="line.351"></a>
<span class="sourceLineNo">352</span>             * BufferedImage.TYPE_USHORT_565_RGB: // Type 08: tested OK 2011.02.27<a name="line.352"></a>
<span class="sourceLineNo">353</span>             * BufferedImage.TYPE_USHORT_555_RGB: // Type 09: tested OK 2011.02.27<a name="line.353"></a>
<span class="sourceLineNo">354</span>             *<a name="line.354"></a>
<span class="sourceLineNo">355</span>             * Note: as ras.getPixels(..) returned colours in the order R, G, B, A (optional)<a name="line.355"></a>
<span class="sourceLineNo">356</span>             * for both TYPE_4BYTE_ABGR &amp; TYPE_3BYTE_BGR,<a name="line.356"></a>
<span class="sourceLineNo">357</span>             * it is assumed that TYPE_INT_BGR will behave similarly.<a name="line.357"></a>
<span class="sourceLineNo">358</span>             */<a name="line.358"></a>
<span class="sourceLineNo">359</span>        }<a name="line.359"></a>
<span class="sourceLineNo">360</span>    }<a name="line.360"></a>
<span class="sourceLineNo">361</span><a name="line.361"></a>
<span class="sourceLineNo">362</span>    /**<a name="line.362"></a>
<span class="sourceLineNo">363</span>     * Clone a {@link BufferedImage}.<a name="line.363"></a>
<span class="sourceLineNo">364</span>     * &lt;p&gt;<a name="line.364"></a>
<span class="sourceLineNo">365</span>     * Note: when constructing the clone, the original Color Model Object is<a name="line.365"></a>
<span class="sourceLineNo">366</span>     * reused.&lt;br&gt;  That keeps things simple and should not be a problem, as all<a name="line.366"></a>
<span class="sourceLineNo">367</span>     * known Color Models&lt;br&gt;<a name="line.367"></a>
<span class="sourceLineNo">368</span>     * ({@link java.awt.image.IndexColorModel     IndexColorModel},<a name="line.368"></a>
<span class="sourceLineNo">369</span>     *  {@link java.awt.image.DirectColorModel    DirectColorModel},<a name="line.369"></a>
<span class="sourceLineNo">370</span>     *  {@link java.awt.image.ComponentColorModel ComponentColorModel}) are<a name="line.370"></a>
<span class="sourceLineNo">371</span>     * immutable.<a name="line.371"></a>
<span class="sourceLineNo">372</span>     *<a name="line.372"></a>
<span class="sourceLineNo">373</span>     * @param image original BufferedImage to clone<a name="line.373"></a>
<span class="sourceLineNo">374</span>     *<a name="line.374"></a>
<span class="sourceLineNo">375</span>     * @return a new BufferedImage reusing the original's Color Model and<a name="line.375"></a>
<span class="sourceLineNo">376</span>     *         containing a clone of its pixels<a name="line.376"></a>
<span class="sourceLineNo">377</span>     */<a name="line.377"></a>
<span class="sourceLineNo">378</span>    public static BufferedImage cloneImage(BufferedImage image) {<a name="line.378"></a>
<span class="sourceLineNo">379</span><a name="line.379"></a>
<span class="sourceLineNo">380</span>        WritableRaster rin = image.getRaster();<a name="line.380"></a>
<span class="sourceLineNo">381</span>        WritableRaster ras = rin.createCompatibleWritableRaster();<a name="line.381"></a>
<span class="sourceLineNo">382</span>        /**/ ras.setRect(rin); // &lt;- this is the code that actually COPIES the pixels<a name="line.382"></a>
<span class="sourceLineNo">383</span><a name="line.383"></a>
<span class="sourceLineNo">384</span>        /*<a name="line.384"></a>
<span class="sourceLineNo">385</span>         * Buffered Images may have properties, but NEVER disclose them!<a name="line.385"></a>
<span class="sourceLineNo">386</span>         * Nevertheless, just in case someone implements getPropertyNames()<a name="line.386"></a>
<span class="sourceLineNo">387</span>         * one day...<a name="line.387"></a>
<span class="sourceLineNo">388</span>         */<a name="line.388"></a>
<span class="sourceLineNo">389</span>        Hashtable props = null;<a name="line.389"></a>
<span class="sourceLineNo">390</span>        String[] propNames = image.getPropertyNames();<a name="line.390"></a>
<span class="sourceLineNo">391</span>        if (propNames != null) { // ALWAYS null<a name="line.391"></a>
<span class="sourceLineNo">392</span>            props = new Hashtable();<a name="line.392"></a>
<span class="sourceLineNo">393</span>            for (int i = 0; i &lt; propNames.length; i++) {<a name="line.393"></a>
<span class="sourceLineNo">394</span>                props.put(propNames[i], image.getProperty(propNames[i]));<a name="line.394"></a>
<span class="sourceLineNo">395</span>            }<a name="line.395"></a>
<span class="sourceLineNo">396</span>        }<a name="line.396"></a>
<span class="sourceLineNo">397</span>        return new BufferedImage(image.getColorModel(), ras,<a name="line.397"></a>
<span class="sourceLineNo">398</span>                image.isAlphaPremultiplied(), props);<a name="line.398"></a>
<span class="sourceLineNo">399</span>    }<a name="line.399"></a>
<span class="sourceLineNo">400</span>}<a name="line.400"></a>




























































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